Vulnerabilities (CVE)

Filtered by vendor Openvpn Subscribe
Filtered by product Openvpn
Total 33 CVE
CVE Vendors Products Updated CVSS v2 CVSS v3
CVE-2017-7508 1 Openvpn 1 Openvpn 2019-10-03 5.0 MEDIUM 7.5 HIGH
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service when receiving malformed IPv6 packet.
CVE-2017-7521 1 Openvpn 1 Openvpn 2019-10-03 4.3 MEDIUM 5.9 MEDIUM
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to remote denial-of-service due to memory exhaustion caused by memory leaks and double-free issue in extract_x509_extension().
CVE-2017-7520 1 Openvpn 1 Openvpn 2019-10-03 4.0 MEDIUM 7.4 HIGH
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service and/or possibly sensitive memory leak triggered by man-in-the-middle attacker.
CVE-2017-7479 1 Openvpn 1 Openvpn 2019-10-03 4.0 MEDIUM 6.5 MEDIUM
OpenVPN versions before 2.3.15 and before 2.4.2 are vulnerable to reachable assertion when packet-ID counter rolls over resulting into Denial of Service of server by authenticated attacker.
CVE-2016-6329 1 Openvpn 1 Openvpn 2019-07-09 4.3 MEDIUM 5.9 MEDIUM
OpenVPN, when using a 64-bit block cipher, makes it easier for remote attackers to obtain cleartext data via a birthday attack against a long-duration encrypted session, as demonstrated by an HTTP-over-OpenVPN session using Blowfish in CBC mode, aka a "Sweet32" attack.
CVE-2018-9336 2 Openvpn, Slackware 2 Openvpn, Slackware Linux 2018-06-13 4.6 MEDIUM 7.8 HIGH
openvpnserv.exe (aka the interactive service helper) in OpenVPN 2.4.x before 2.4.6 allows a local attacker to cause a double-free of memory by sending a malformed request to the interactive service. This could cause a denial-of-service through memory corruption or possibly have unspecified other impact including privilege escalation.
CVE-2017-7478 1 Openvpn 1 Openvpn 2017-08-16 5.0 MEDIUM 7.5 HIGH
OpenVPN version 2.3.12 and newer is vulnerable to unauthenticated Denial of Service of server via received large control packet. Note that this issue is fixed in 2.3.15 and 2.4.2.
CVE-2008-3459 1 Openvpn 1 Openvpn 2017-08-08 7.6 HIGH N/A
Unspecified vulnerability in OpenVPN 2.1-beta14 through 2.1-rc8, when running on non-Windows systems, allows remote servers to execute arbitrary commands via crafted (1) lladdr and (2) iproute configuration directives, probably related to shell metacharacters.
CVE-2017-7522 1 Openvpn 1 Openvpn 2017-07-07 4.0 MEDIUM 6.5 MEDIUM
OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service by authenticated remote attacker via sending a certificate with an embedded NULL character.
CVE-2005-2534 1 Openvpn 1 Openvpn 2008-09-05 2.6 LOW N/A
Race condition in OpenVPN before 2.0.1, when --duplicate-cn is not enabled, allows remote attackers to cause a denial of service (server crash) via simultaneous TCP connections from multiple clients that use the same client certificate.
CVE-2005-2533 1 Openvpn 1 Openvpn 2008-09-05 2.1 LOW N/A
OpenVPN before 2.0.1, when running in "dev tap" Ethernet bridging mode, allows remote authenticated clients to cause a denial of service (memory exhaustion) via a flood of packets with a large number of spoofed MAC addresses.
CVE-2005-2532 1 Openvpn 1 Openvpn 2008-09-05 5.0 MEDIUM N/A
OpenVPN before 2.0.1 does not properly flush the OpenSSL error queue when a packet can not be decrypted by the server, which allows remote authenticated attackers to cause a denial of service (client disconnection) via a large number of packets that can not be decrypted.
CVE-2005-2531 1 Openvpn 1 Openvpn 2008-09-05 5.0 MEDIUM N/A
OpenVPN before 2.0.1, when running with "verb 0" and without TLS authentication, does not properly flush the OpenSSL error queue when a client fails certificate authentication to the server and causes the error to be processed by the wrong client, which allows remote attackers to cause a denial of service (client disconnection) via a large number of failed authentication attempts.